[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-devel] Shadow's Dirty Bit Problem


  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "zhujun" <zhujun@xxxxxxxxxxxxxx>
  • Date: Sun, 28 Jun 2009 14:04:08 +0800
  • Delivery-date: Sat, 27 Jun 2009 23:04:47 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acn3tj/gv3Vo6pCETmutFUg5nxxSAA==

Hi,

         In the function _sh_propagate, the A&D bits of all the shadow page tables entries above level 1 will be set. (// Set the A&D bits for higher level shadows). I am very confused about it. From Intel manual, the Dirty bit above level 1 is reserved and must be set 0. Am I right? If yes, how does the shadow page table deal with this problem?

         Another question. In Xen’s current version, does it use the Dirty bit to do something?

 

zhujun

 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.